could not figure out!! the a sample test case failed!

Question

#include <stdio.h>

void update(int *a,int *b) {
// Complete this function
if (*a > *b) {
*a = *a + *b;
*b = (*a - *b) - *b;
} else
*a = *a + *b;
*b = *b - (*a - *b);
}

int main() {
int a, b;
int *pa = &a, *pb = &b;

scanf("%d %d", &a, &b);
update(pa, pb);
printf("%d\n%d", a, b);

return 0;
}

The above one is the code.. one of the same test case is two inputs "3514
2122" and the expected output is "5636
1392" but my output is "5636
-2852" the problem statement is "You have to complete the function void update(int *a,int *b), which reads two integers as argument, and sets 'a' with the sum of them, and 'b' with the absolute difference of them." input is handled automatically.

Answer 1

Thats great.. Serena!!!! that worked like magic.. however other test cases worked fine (edit: even without the braces in the else part).. could you give me a little more explanation..!

Answer 2

Yeah got it serene! I ll play with it :)